The architecture is more complex, but the possibilities are greater.
Clusters: all the data in one place
Now you can not just create separate databases, but group data into clusters. You create a cluster, and within it you organize data by shelves. For example: a cluster for an online store with separate databases — for categories and products, customers and purchase history, with a breakdown by branches, and so on.
Users and privileges
Now it works like this: each user in the cluster has access to all databases within it, but they can be allowed to manage the data or only view it.
We will update this functionality in the future as well — it will be possible to give users access only to a certain database within the cluster, and they won't even see the rest.